The non-string-stream variant of sexp_push_char shouldn't push EOF. Probably this shouldn't actually write the char to the buffer, I need to verify we never push a char that wasn't just read.
The non-string-stream variant of sexp_push_char shouldn't push EOF.
Probably this shouldn't actually write the char to the buffer, I need
to verify we never push a char that wasn't just read.

traviscross/chibi-scheme,traviscross/chibi-scheme,traviscross/chibi-scheme,traviscross/chibi-scheme